The study of ionization by electron impact of a substance simulating spent nuclear fuel components

30th International Conference on Interaction of Intense Energy Fluxes with Matter

Antonov, N.N.^1 ; Bochkarev, E.I.^1 ; Gavrikov, A.V.^1 ; Samokhin, A.A.^1 ; Smirnov, V.P.^1

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13, Moscow

125412, Russia^1

关键词: Dynamic property;    Ionization efficiency;    Lead concentration;    Planar electrode;    Plasma separation;    Single ionization;    Spent nuclear fuels;    Thermoelectric currents;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/653/1/012162/pdf
DOI  :  10.1088/1742-6596/653/1/012162

来源: IOP

【 摘 要 】

Plasma sources of model substances are necessary to solve problems associated with development of the spent nuclear fuel (SNF) plasma separation method. Lead was chosen to simulate kinetic and dynamic properties of the heavy SNF components. In this paper we present the results of a study of a lead vapor discharge with a lead concentration of 1012-1013cm-3. Ionization was carried out by an electron beam (with energy of up to 500 eV per electron) inside a centimeter gap between planar electrodes. The discharge was numerically modeled using the hydrodynamic and single-particle approximation. Current-voltage characteristics and single ionization efficiency were obtained as functions of the vapors concentration and thermoelectric current. An ion current of hundreds of microamperes at the ionization efficiency near tenths of a percent was experimentally obtained. These results are in good agreement with our model.